Bump sphinxemoji from 0.2.0 to 0.3.1 (#2316)

Bumps [sphinxemoji](https://github.com/sphinx-contrib/emojicodes) from 0.2.0 to 0.3.1.
- [Commits](sphinx-contrib/emojicodes@v0.2.0...v0.3.1)

---
updated-dependencies:
- dependency-name: sphinxemoji
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Sam <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -26,7 +26,7 @@ markdown==3.7
 ruamel.yaml==0.18.7
 lxml==4.8.0
 # For emoji
-sphinxemoji==0.2.0
+sphinxemoji==0.3.1
 # For atom feed support
 Werkzeug==0.16.1 # pyup: <1.0
 # For fancy 404 pages